Uranium assay determination using Davies and Gray titration: an overview and implementation of GUM for uncertainty evaluation |
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Authors: | K J Mathew S Bürger S Vogt P Mason M E Morales-Arteaga U I Narayanan |
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Institution: | (1) Department of Energy, New Brunswick Laboratory, 9800 South Cass Avenue, Bldg 350, Argonne, IL 60439, USA |
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Abstract: | The International Organization for Standardization (ISO) Guide to the expression of Uncertainty in Measurement (GUM) was developed
to meet the demand for a standardized way of evaluating and expressing uncertainties. The Davies and Gray (D&G) titrimetry
method is routinely used in nuclear safeguards for uranium accountability measurement and a statement of the uncertainty that
can reasonably be attributed to the measured assay value is therefore of importance. A mathematical model for an uncertainty
evaluation of D&G measurements in compliance with ISO GUM is presented. This is illustrated by a numerical example and the
utilization of the uncertainty budget is explored. |
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